Motorcycle



W. J. CANFIELD.

MOTORCYCLE.

APPLICATION FILED JUNE4. 1919.

Patented Nov. 18,- 1919.

Il -III W. J. CANFIELD.

MOTORCYCLE.

APPLICATION HLED JUNE 4. 1919.

1 ,32 1 ,978. Patented Nov. 18, 1919.

2 SHEETSSH EET 2.

Ill

WNITED STATES PATENT OFFICE.

WILLIE J. CANFIELD, 0F ESCATA'WPA, MISSISSIPPI.

ivto'roncrcnn.

Specification of Letters Iatent. Patented N 18, 1919.

Application filed June 4, 1919. Serial No. 301,616.

cycles, of which the following is a specification, reference being had to the accompanyingdrawings.

This invention relates to the rt of motorcycles, and an ob ect of the invention is the provision ofa construction of motorcycle and attaching means therefor, whereby it can be applied to the frame of an ordinary bicycle, thereby converting a bicycle into a motorcycle, there belng the usual means carried by the motorcycle handle bars (which are substituted for the usual bicycle handle bars) for controlling the motor.

The invention further aims to provide means for suitably attaching themotorrigidly and firmly on the frame of the bicycle.

The invention further aims to provide improved gear connections between the motor and the rear wheel of the bicycle,

which, in the present instance as a design of the invention, is provided wlth a coaster brake, so that through the medium of gear connections between the motor and the rear wheel, power may be transmitted to the 1 rear wheel, without operating the usual pedals of the bicycle.

The invention further aims to provide suitable means for guarding the chains of the gear connections between the rear wheel and the motor. 1 a

While the design and construction at present illustrated and set forth is deemed preferable, it is obvious that 'as a result of a reduction of the invention to more practical form for commercial purposes, the 1nvention may be susceptible to changes, and a the right to these changes is claimed, provided they are comprehended within the scope of what is claimed.

The invention comprises further features and combination of parts, as hereinafter set forth, shown in the drawmgs and claimed.

. In the drawings:

Figure 1 1s a view 111 side elevatlon of a conventional form of bicycle, showing the motor as applied, and the means for attaching the motor to the frame, and illustrating the gear connections.

if h

Fig. 2 isaview in elevation showing. the

elevation'of the rear sprocket of, the rear wheel of the bicycle, to be operated by the gear connectlons with the motor.

Fig. 5 is a detail sectional view of the clamplng means for clampmg the sprocket detachably on the'rear wheel of the bicycle.

Fig. 6 is a detail view of the clamp for attaching a part of the motor to the frame of the bicycle. i

F "g. 7 is a detail sectional view on line 77 of Fig. 3, showing the eccentric mount- I ing for the sprockets 14 and 15.

Referring more especially to the drawings,

1 designates the hanger frame of the bicycle,

which is of the usual construction, 2 denotes the front forks, and 3 the front wheel and 1 the rear wheel, and 5 denote the handle bars, which are of the motorcycle type, in 1s)ubstitution for the usual bicycle handle ars.

conventional form of motorcycle engine 6 lsprovided and carried by the top portion of the cylinder of the engine is a clamp 7 to engage the forward rearwardly and downwardly inclined bar of the hanger frame 1, there being a suitable tightening bolt 8 for securing the clamp in place. i

By means of a clamp 9, a combined sprocket and motor supporting hanger frame 10 is clamped and also supported on the forward rearwardly and downwardly inclined bar or tube of the hanger frame 1. An ad ditional clamp 11 is provided for addition ally securing the framelO to the forward downwardly and rearwardly inclined rod or tube of the hanger frame 1. By means of an additional clamp 12 the motor is additionally secured to and clamped on the hanger frame,

and rigidly relatively to the central brace bar of the hanger frame 1.

The sprocket hanger frame is. provided with a suitable bearing 13 for the reception of a cylindrical axle or member 15* providcd with an integral flange 14* at one end,

which overlies. one end of the bearing 13, to

v provided with diametrically opposite recesses or. notches 15, to also beeengaged by sprockets. 7 other end threaded a as shown, and engaging prevent' movement ofithe axle or member 14 in one direction. Projecting eccentrically from one end of the axle or member l'iis a stub axle or projection 14, on which the sprockets 14 and 15 are journaled, there being a suitable nut 14 and washer l4= "'on the" stub axle, to retain the two sprockets in position. The V axle or member" 145* is prothe threads is a ring 13", to prevent theend movement of the axle or' member le -in the .oppositedirection,= Thisring orband13 is provided withidiametrically. opposite notches 13, to be engaged by-a spanner wrenchlfor screwing: the band or ring home. The threaded endof theaxle or member 143 'is a spanner wrench (not shown), whereby the axle or member 14 may be-adj usted. B adjusting: the axle. or member. 14%, it will be observed that an .eccentrically mounted stub axle may bepositioned, so as to tighten the sprocket chain's, which cooperate ior' engage the sprockets 14 and'15. These sprockets 1 1 and? 15 rotate as: one body and engaging about the sprocket; 14 is asprocket' chain 16, which in turn passes about thesprocket 17 of the; crankshaft 1 8 of'the explosive motor 6, which is o'f the conventional type;

A suitable chain guard or hood 19is s'ecured at 2O to. the wall'of the crankicasing of the -motor. Engaging; about and being operated by the sprocket 15 is sprocket chain- 21, which travels about the sprocket 22,1which-is carried by androtatabl-e with I the rear wheeleof thebicycle; BymeansEof a circular clampinge'rin'gl28' (which isse- I the bicycle,gby means of'the clamping plates the-bicycle, so that" the rear wheel maybe and bolts 24zand' 2 5), thesprocket 22- is revolubleiwith: the rear wheel 4: of the bicycle. To convert-a bicycle-into aimotorcycle qas herein devised, 5 a conventional form ofcoasterbrake (not shown) may be 1 carriedat26 1n. connectlon With the reari'wheel 4 :of

Opera-ted"- Y- e: motor, without: imparti motion: to; the cranks and pedalsoff the 1 bicycle: However, it'is:obviousthat by operating the cranksand the pedals, motion 3 will; be imparted to the rear wheel'ofthe bicycle, so; that power may be: transmitted motor, for starting the same.

through the medium of thechain 21 to the A: suitable guard or hood 27 is secured at=28ato the rear part of the hanger frame 1, and as-at 29 to the hood or guard 18, for guarding the upper part of the s rocket chain 21.

The usual gasol ne supply tank 30 is car ried by the upper bar of the hanger frame 1', and is provided with the usual oil and gas cap controlled openings 32 and 33. This gasolene tank is provided with the usual.

, feed connection-34 to the carburetor of the motor: and the sprocket 14-,andbetween the sprocket 15 andthe" sprocket 22, whereby said chainsunay be tightened or loosened, as may be'requiredi- A' conventional form of: muffler 3'8- is carried by the motor, for connection to the exhaust manifold, for muifling. utilized gases of the motor.

Fronr the foregoing, it is obvious that therehas beendevised an improved construction of device,- whereby a conventional form of bicyclecan be converted into a motorcycle, by; applying a conventional form of gasolen'e motor to the hangerframe of:the bicycle;

The invention havinglbeen set forth, what isrclaimed 9 as new and useful is 1. In a device: asset forth, the combination with: a bicycle hanger frame provided with anrear-r drive wheel having a coaster brake, of an auxiliary'gearingsupporting frame, means for mounting said auxiliary framev on: the hanger frame, a pairof sprockets mounted on: the auxiliary frame, one having gear connections: with the'rear drive-wheel of the bicycle, amotor on the cured -.to the spokesof the rear wheel e of hanger frame'and having its-crank shaft ge'arede to the other sprocket, means for clamping the motor on the hanger frame, and guards for the gear connections between the sprockets and 1 the crank shaft of the 11101301',L11l the: gear connections-between one:- of the sprockets and the rear drive wheel.

': sprockets, mean-s for clamping the auxiliary frame to: the forwardly arranged rearwardly inclined bar of the hanger framev and depending diagonally downwardly therefrom, of a combustion motorr having its-crank shaft connected to, one of the sprockets and being rigidly supported on the hanger frame, a rear sprocket having gear connections with the other sprocket of the auxiliary frame, means for clamping the rear sprocket t0 the spokes of the rear drive wheel of the bicycle, and guard means for the gear connections between the sprockets and the crank shaft and the rear sprocket.

3. The combination with a bicycle, including a hanger frame having a rear drive wheel, of an auxiliary gear supporting the frame including a pair of adjustable sprockets, means for clamping the auxiliary frame to the forwardly arranged but rearwardly inclined bar of the hanger frame, a

combustion motor rigidly supported on the hanger frame and having its crank shaft connected to one of the sprockets, rear sprockets having gear connections with the other sprocket of the auxiliary frame, means for clamping the rear sprocket detachably to the spokes of the rear drive wheel of the bicycle, and pedally operated means geared to the rear drive wheel.

In testimony whereof I hereunto affix my signature in the presence of two witnesses.

WILLIE J. CANFIELD. Witnesses:

F. S. MOINNIS, JOHN E. OANFIELD. 

